Features 1、650nm semiconductor special laser is used as light-emitting device (uncommon LED), which is driven by a constant current source to emit stable red light. 2、Enter single-mode (or multi-mode) fiber with optical interface connection port, find light leakage or bending point by observing red light overflow point to realize the fiber fault detection. 3、Suitable for various optical fiber interfaces, standard 2.5mm interface, used for FC/ST/SC any interface. 4、Pulse continuous waves is used to quickly locate fault breakpoints. The light source is powerful and easy to penetrate. 5、Widely used in optical fiber engineering construction, optical fiber network maintenance, optical device production and research, etc. Specification Item Type: Fiber Optical Tester Material: Aluminum Alloy Product Model: TL532 (50mW) Red Light Output Power: >50mw Light Source Wavelength: 650nm Use Optical Fiber: SM, MM Maximum Theoretical Test Distance: 1-5km Power Supply: 2 x AA Battery (Battery Not Included) Red Light Source Continuous Working Time: ≥20h Working Temperature: 0-60℃ Storage Temperature: -20 - +70℃ Package List 1 x Fiber Optical Tester (Battery Not Included) 1 x Portable Bag 1 x Manual